fn keys stopped working after kernel update (HP Pavilion 15-R008NS)

[Ganton]

In a HP Pavilion 15-R008NS: fn keys stopped working after kernel update. For example, if you press Fn+F3 it's the same as pressing F3.

That was the update (from the /var/log/apt/history.log file):

Start-Date: 2021-11-09 19:14:19
Commandline: apt full-upgrade
Install: linux-image-5.4.0-90-generic:amd64 (5.4.0-90.101, automatic), linux-headers-5.11.0-40-generic:amd64 (5.11.0-40.44~20.04.2, automatic), linux-modules-extra-5.11.0-40-generic:amd64 (5.11.0-40.44~20.04.2, automatic), linux-modules-extra-5.4.0-90-generic:amd64 (5.4.0-90.101, automatic), linux-modules-5.11.0-40-generic:amd64 (5.11.0-40.44~20.04.2, automatic), linux-headers-5.4.0-90-generic:amd64 (5.4.0-90.101, automatic), linux-headers-5.4.0-90:amd64 (5.4.0-90.101, automatic), linux-modules-5.4.0-90-generic:amd64 (5.4.0-90.101, automatic), linux-hwe-5.11-headers-5.11.0-40:amd64 (5.11.0-40.44~20.04.2, automatic), linux-image-5.11.0-40-generic:amd64 (5.11.0-40.44~20.04.2, automatic)
Upgrade: linux-headers-generic-hwe-20.04:amd64 (5.11.0.38.42~20.04.17, 5.11.0.40.44~20.04.18), linux-headers-generic:amd64 (5.4.0.89.93, 5.4.0.90.94), linux-libc-dev:amd64 (5.4.0-89.100, 5.4.0-90.101), linux-image-generic:amd64 (5.4.0.89.93, 5.4.0.90.94), linux-image-generic-hwe-20.04:amd64 (5.11.0.38.42~20.04.17, 5.11.0.40.44~20.04.18), linux-generic-hwe-20.04:amd64 (5.11.0.38.42~20.04.17, 5.11.0.40.44~20.04.18), linux-generic:amd64 (5.4.0.89.93, 5.4.0.90.94)
End-Date: 2021-11-09 19:21:02
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: to 1278 F.... pulseaudio
 /dev/snd/controlC0: to 1278 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
DistroRelease: Ubuntu 20.04
HibernationDevice: RESUME=UUID=2aa88c03-1e8a-4bda-a77c-3cb32660af5b
InstallationDate: Installed on 2018-10-25 (1111 days ago)
InstallationMedia: Kubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: Hewlett-Packard HP 15 Notebook PC
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-40-generic root=UUID=74203cf3-a748-4899-b6f1-7f54ed94b93f ro initcall_debug no_console_suspend
ProcVersionSignature: Ubuntu 5.11.0-40.44~20.04.2-generic 5.11.22
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-40-generic N/A
 linux-backports-modules-5.11.0-40-generic N/A
 linux-firmware 1.187.20
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: focal
Uname: Linux 5.11.0-40-generic x86_64
UnreportableReason: Este informe es sobre un paquete que no se encuentra instalado.
UpgradeStatus: Upgraded to focal on 2020-05-25 (533 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: False
dmi.bios.date: 06/27/2018
dmi.bios.release: 15.69
dmi.bios.vendor: Insyde
dmi.bios.version: F.45
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 2211
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 86.56
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 86.56
dmi.modalias: dmi:bvnInsyde:bvrF.45:bd06/27/2018:br15.69:efr86.56:svnHewlett-Packard:pnHP15NotebookPC:pvr0976100000405F00000620180:skuJ5B28EA#ABE:rvnHewlett-Packard:rn2211:rvr86.56:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.family: 103C_5335KV G=N L=CON B=HP S=PAV
dmi.product.name: HP 15 Notebook PC
dmi.product.sku: J5B28EA#ABE
dmi.product.version: 0976100000405F00000620180
dmi.sys.vendor: Hewlett-Packard

[Ganton (ganton)]

$ lsb_release -rd
Description: Ubuntu 20.04.3 LTS
Release: 20.04

$ apt-cache policy linux-image-generic-hwe-20.04
linux-image-generic-hwe-20.04:
  Instalados: 5.11.0.40.44~20.04.18
  Candidato: 5.11.0.40.44~20.04.18
  Tabla de versión:
 *** 5.11.0.40.44~20.04.18 500
        500 http://mirror.lstn.net/ubuntu focal-updates/main amd64 Packages
        500 http://mirror.lstn.net/ubuntu focal-security/main amd64 Packages
        100 /var/lib/dpkg/status
     5.4.0.26.32 500
        500 http://mirror.lstn.net/ubuntu focal/main amd64 Packages

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1950389

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Ganton (ganton)]

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[Ganton (ganton)]

It seems that it's solved nowadays. Thanks.